I wonder if anyone has ever tried that!! I used to get double shots all the time and wow did I get adrenal burn out from it. But, I knew someone who got quads all the time. That's 4 shots of espresso in 1 cup of coffee. Wooo hooo!
Well, it depends on the strength of espresso they serve. It could be very powerful and might burn your tongue; or it could be weak and won't hurt you at all, even your palate
Not sure if it burns the tongue, but I would imagine 4 shots of espresso would do a number on your stomach. Particularly if it's added to a cup of coffee. That would make for a very acidic beverage, not to mention high powered. LOL